In the mystical realm of Shikizakura, where cherry blossoms bloom alongside autumn leaves, a crucial ritual to safeguard humanity is on the brink of commencement. Unexpectedly drawn into a team equipped with powerful suits designed to combat the malevolent Oni spirits that threaten the mortal realm, high schooler Kakeru Miwa embarks on a journey as an unconventional member. These Oni seek to possess humans and anchor themselves in the world of the living, but only the ancient-futuristic Yoroi power suits stand as a barrier against their nefarious intentions. Determined to become a valiant hero, Kakeru joins forces with Ouka Myoujin, the destined shrine maiden entrusted with the world's salvation. Amidst the enchanting backdrop of Shikizakura's seasonal beauty, where Ouka gracefully dances amidst the harmonious blend of cherry blossoms and falling leaves, a tale of heroism unfolds. Witness as the past merges with the future, the mortal realm meets the spirit realm, and aspirations intertwine with reality in a thrilling saga of courage and sacrifice!